数组中的元素的总和 [英] Sum of elements in an array

问题描述

我工作的一个简单的赋值一个夏天的Java课程，只是希望你们能来看看我的code，看看我做的方式是最好的方式。其目的是创建一个简单的 INT 阵列，至少有25个元素，并使用循环遍历它，并添加了所有的元素。我有一些问题，但看起来像我得到它的工作。我工作了之后，我做了一些研究，看到那里的人用For Each循环（循环增强）一些类似的东西。那会是一个更好的选择吗？我有点困惑在使用该反对常规循环的最佳方式。

不管怎样，帮助我任何意见或批评是一个更好的程序员！

 公共类遍历{    公共静态无效的主要（字串[] args）{        INT absenceTotal = 0;
        //使用缺勤30天初始化数组。
        INT absencesArr [] = {1，3,0，9,8，23，1，
                11，23，5，6，7，10，1，5，
                14，2，4，0，0，1，3，2，1，
                1，0，0，1，3，7，2};        的for（int i = 0; I＆LT; absencesArr.length;我++）{
            absencesArr [I] + = absenceTotal;
            absenceTotal = absencesArr [I]
        }
        的System.out.println（有+ absenceTotal +缺失的那一天。）;
    }
}
 

解决方案

不要修改该数组。我想preFER的 的for-each 循环。你应该认为有可能是一个非常大的数字的学生，所以我可能会使用长为之 。和格式化输出。一起投入像

 长总和= 0;
对于（INT I：absencesArr）{
    总和+ =我;
}
//的System.out.println（有+总和+缺失的那一天。）;
System.out.printf（有％d个没啥当日％N，总和）;
 

I'm working on a simple assignment for a summer java course and was just hoping you guys could take a look at my code and see if the way I did it is the best way. The purpose is to create a simple int array with at least 25 elements and use a loop to traverse it and add up all the elements. I had some issues but looks like I got it to work. After I work it out I did a little research and saw some similar stuff where people were using a For Each loop (enhanced loop). Would that be a better option? I'm kinda confused on the best ways to use that opposed to a regular for loop.

Anyway, any comments or criticism in helping me be a better programmer!

public class Traversals {

    public static void main(String[] args) {

        int absenceTotal = 0;
        // initialize array with 30 days of absences.
        int absencesArr[] = { 1, 3, 0, 9, 8, 23, 1, 
                11, 23, 5, 6, 7, 10, 1, 5,
                14, 2, 4, 0, 0, 1, 3, 2, 1, 
                1, 0, 0, 1, 3, 7, 2 };

        for (int i = 0; i < absencesArr.length; i++) {
            absencesArr[i] += absenceTotal;
            absenceTotal = absencesArr[i];
        }
        System.out.println("There were " + absenceTotal + " absences that day.");
    }
}

解决方案

Don't modify the array. I would prefer the for-each loop. And you should consider that there may be a very large number of students, so I would probably use a long for sum. And formatted output. Putting that together into something like

long sum = 0;
for(int i : absencesArr) {       
    sum += i;
}   
// System.out.println("There were " + sum + " absences that day.");   
System.out.printf("There were %d absences that day.%n", sum);

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